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We have a space junk problem. Fragments from very small (a millimeter) to much bigger (several meters) are whirling around overhead at fantastic speeds, threatening satellites and astronauts.

01 / Nissan For creating the Leaf, the first mass-market electric car. 02 / Nike > > For its mix of sports, style, and yes, plastic bottles

It was a through-the-looking-glass moment for Chris Goldfinger, sitting in a meeting about Sumatran earthquakes on a recent Friday afternoon in Chiba, Japan, on the outskirts of Tokyo.

01 / SolarCity > > For being the nation's leading installer of rooftop solar panels. In sum, SolarCity has placed more than 10,000 solar rooftops--10% of the total in the U.S.

On April 12, 1961, Soviet cosmonaut Yuri Gagarin did something no human had done before. On board the Vostok 1 spacecraft, Gagarin became the first person in space after rocketing into the sky from a launch site in Kazakhstan for a nearly two-hour flight

Yes, says Stanford. We're not so sure. A Stanford study shows that after cutting down a virtual reality tree, people are more likely to conserve paper

Venus is Earth's closest sibling, in terms of size and proximity, but it remains relatively little explored compared with Earth's other planetary neighbor, Mars. For instance, NASA and the European Space Agency (ESA) currently have three working Mars orbiters and one active Mars rover between them, whereas at Venus, ESA's Venus Express spacecraft has the place to itself

When you hear about asteroids close to the Earth, you probably have visions of collisions and extinctions and a postapocalyptic future. Or of brave space cowboys trying to knock them off course. You probably don’t picture a puppy that’s followed you home

Each day, Inc.'s reporters scour the Web for the most important and interesting news to entrepreneurs.

I still remember the excitement and fear of April 12, 1961, the day Yuri Gagarin became the first human to travel into space. I was seven years old: too young to fully appreciate the thrill many people felt that the mysterious universe beyond Earth had suddenly been conquered and that the adventures of the swashbuckling Flash Gordon were now one step closer to reality

The Dead Sea is a place of mystery: the lowest surface on Earth, the purported site of Sodom and Gomorrah, a supposed font of curative waters and, despite its name, a treasure trove of unusual microbial life.

Astronomers are probably just a few years from the first-ever finding of an Earth twin outside our solar system, that is, a planet roughly the size of Earth orbiting at a similarly temperate distance from a sun-like star.

Fifty years ago, in the summer of 1960--the same year that a U.S.

How did life start on Earth? Science still has no definitive answer

If your YouTube viewing experience seems a little strange this weekend, don't be alarmed. YouTube is aiming to increase awareness of this year's Earth Hour by darkening its video watch page this Saturday from 8:30 PM to 9:30 PM (in your local timezone). Check out the video below for more info, and read more about Earth Hour here